Hi /r/penpals! I might want to try this out, but I got some questions regarding being a penpal first

I hope it's okay to start a new thread to ask some questions. The FAQ didn't work, tried it several times.

Well, I have quite a few questions about what you expect from a penpal:

How often do you expect your penpal to write to you? Does this vary between snail mail and e-mail? There are periods where I have plenty of time to write letters and periods where I'm really busy with other stuff.

How long letters do you expect? Again: difference between snail mail and e-mail?

Especially Native English speakers: Do you expect the language to be top notch (from a non-native speaker)? I think my written English is decent, but it often takes quite some time to write good/correct sentences.

Does snail mail letters mean hand written letters or is it acceptable to send PC written letters in the old fashioned way? Just curious.

Is it considered rude to stop sending letters if you don't find it interesting/rewarding to continue with a certain penpal? And you tell the penpal that you are going to stop of course.

When you start as either snail mail pals or e-mail pals does it stay that way, or do you sometimes send e-mails and sometimes traditional letters?

Wow, that turned out to be quite a few questions. I understand that the answers will vary from redditor to redditor, but I just want to get a general idea before I really go for it and write my own introduction post!